PHILADELPHIA (CBS) — Detectives are investigating a double stabbing early Wednesday in Philadelphia’s Mt. Airy section.

Two people were stabbed at Johnson Street and Stenton Avenue around 3 a.m. The stabbing happened outside the CHE Bar & Grill.

One of the victims died; the other is in critical condition at Albert Einstein Medical Center.

The circumstances behind the stabbings are unclear. Police are combing through surveillance footage in their investigation.

Police say the suspect is a man last seen wearing a black jacket. Police say he has a thin build and a full beard. He was seen fleeing the scene in a Buick LeSabre.

Rapper Nicki Minaj tweeted that the two victims were members of her tour.

Anyone with information is urged to call 911.